Safety mechanism for elevator-shaft doors



March 18, 1924. 1,487,027

A.J.ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS Filed June 12. 1922 4 Sheets-Sheet 1 INVENTOR March 18, 1924. 1,487,027

A. J. ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS Filed June 12. 1922 4 Sheets-Sheet 2 l cal-l INVENTOR ATTORNEY March 18, 1924.-

A. J. ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS Filed June' 12, 1922 4 Sheets-Sheet INVENTOR flare/ f fay-4 73573,?

.21 ATTORNEY March 18, 1924. 1,487,027

A. J. ROSENTRETER SAFETY MECHANISM FOR ELEVATOR SHAFT DOORS Filed June' 12. 1922 4 Sheets-Sheet 4 Patented Mar. 18, 1924.-

ALBERT J. ROSENTBETER. OF BOONTON. NEW JERSEY, ASSIG-NOR TO FRANK E. HUTCHINS, OF NEW YORK, N. Y., AND EDGAR ZABRISKIE, OF MAPLEWOOD,

NEW JERSEY.

SAFETY MECHANISM FOR ELEVATOR-SHAFT DOORS.

Application filed June 12, 1922. Serial No. 567,748.

To all 107mm it may concern:

Be it known that T, Annnn'r .l. ROSEN- Tim'rnn, a citizen of the United Statcs. and resident of Boonton, in the county of Morris and State of New Jersey. have invented certain new and useful lm 'n'ovcments in Safety Mechanism for Elevator-Shaft Doors, of which the following is a specitication.

The invention relates to safety mcchanisu'is for elevator shaft doors, and one object of the invention is to prevent the accidents which arise from elevator cars being started in motion from a floor of a building before the shaft door at such floor has been wholly or substantially closed. A further object of the invention is to provide means which will prevent the opening of the elevator shaft door except when the car has, been brought to rest in proper relation to the floor at which the door is located.

A further purpose of the invention is to secure the elements of safety by means having a wholly mechanical operation, thus eliminating any necessity for the use of the electric current, magnetic appliances and the like in the accomplishment of the objects of the invention.

A further purpose of the invention is to provide special safety means which become actuated on and by the opening movement of the shaft door and do not require any attention by the operator on the car except that of opening the shaft door in the usual manner when the car has come to rest, these means being located at each floor of the building and each set thereof being independent and self-contained and having no relation to switch or cut out boxes commonly employed in safety mechanisms utilizing the electric current as a part of their systems.

The mechanism of my invention comprises two sets of cooperative devices, one being a shaft set located at each floor of a building and operable on the opening movement of the shaft door with which it is connected, and the other being on the car in proper relation to the usual control-lever thereon and adapted to be actuated to lock said control-lever in its neutral position when the car has been brought to rest at a floor of a building and the shaft door at such floor is opened and thereby operates the shaft devices to engage and actuate the control-lever locking devices on the car. The shaft devices maintain the locking devices on the car in operative position securing the control lever in neutral position so long as the shaft door remains open, and when the shaft door is closed the devices connected therewith release the locking devices on the car to move to inoperative position and permit the control lever to be actuat ed as usual to effect the ascent or descent of the car. At each floor of the building, therefore, 1 provide an independent actuating mechanism which is connected with and operable by the shaft door on the ordinary opening and closing movements of the same and requiring no separate attention on the part of the car-operator, and on the car I provide a control-lever locking mechanism which is inoperative except when positioned for operation by the said actuating mecha: nism on the arrival of the car at a floor and the shaft door thereat is moved to open. The said actuating mechanism is preferably secured to the inner face of the door-sill adjacent to the back vertical plane of the door opening, and the connection of said mechanism with the shaft door is preferably by means of a link connecting said mechanism with the dooropening levers with which elevator shaft doors are equipped and which are used bv the car operator to open the doors when the car comes to rest, these door-opening levers varying in type and in the present instance serving as means for opening the door and at the same time acting through said link to operate said actuating mechanism to compel it to position the control-lever locking mechanism on the car.

The actuating mechanism I provide at each floor performs the further duty of locking the shaft door thereat against appreciable opening movement except when the car has been arrested in proper position at the floor, thereby compelling the operator to bring his car into safe relation to the floor at which the shaft door is to be opened to permit the ingress or egress of passen-, gers.

My invention also compels the closing of the shaft door before the car thereat may be re-started in motion.

, the shaft-doors in closed position at a floor of a building, Fig. 1 also illustrating the door as equipped with door-opening levers,

or door-control mechanlsm, as commonly designated, and also illustrating the actuating mechanism of my invention secured to the door-sill and connected by a vertical link to said levers, and also a shoe forming a part of the control-lever locking mechanism carried by the car, said shoe being in correct 1 position with relation to said actuating mechanism to be engaged by the same on the opening movement of the shaft door, and the position of said shoe indicating that the car has come to rest in safe relation to the floor to enable the opening of the shaftdoor;

Fig. 2 is a like view of the same with the shaft door shown in open position and the said actuating mechanism as having been operated from the door-opening levers to engage and move said shoe for the purpose thercthrough and its connections of effecting the locking of the car control lever in neutral position and maintaining the same so locked while the shaft door is open;

Fig. 3 is a face view, on a larger scale and partly broken away and with the front cover of the enclosing casing removed, of the said actuating mechanism and illustrating the position of the parts thereof under a-condition in which an attempt has been made to open the shaft door before the car has reached the floor and positioned its shoe adjacent to said mechanism, the latch bolt of said mechanism being shown as having become interlocked with said casing and arresting the otlfer parts of said mechanism and therethrough the door opening levers with the result of. preventing the opening of the shaft door;

Fig. 4; is a like view of the same showing the latch bolt of the actuating mechanism as having become interlocked with the enclosing casing by its engagement. on the attempt to open the shaft door, with the extreme upper end of the shoe carried by the car, the car not having safely reached the floor for the opening of the shaft door and consequently not having sufliciently positioned said shoe with relation to said actuating mechanism for said mechanism either to permit the shaft door to open or cause the mechanism carried by the car to lock the control lever thereon in neutral position:

Fig. 5 is a view corresponding with. Figs. 3 and but showing the actuating mechanism in normal position ready for operation, as in Fig. 1, and the shoe carried by meme? the car as having attained a correct relation to said mechanism to be actuated therefrom on the opening of the shaft door, thereby to effect on the opening of the. door, the locking of the control lever on the car in its neutral position;

Fig. 6 is a view corresponding with Fig. 5 but showing the actuating mechanism as having been operated by the opening movement of the shaft door and as having,

through its latch bolt, pushed the shoe carried by the car in a direction from said mechanism, whereby to cause said shoe to actuate its connections .for effecting the locking of the car control-lever in neutral position;

Fig. 7 is a horizontal section through the actuating mechanism and shoe taken on the dotted line 7---7 of Fig. 5;

Fig. 8 is a front elevation. partly broken away and partly in section, of the levers preferred by me for use in opening the shaft door, this mechanism comprising a spring for closing the door and a'checking cylinder for cushioning the action of the spring;

Fig. 9 is a horizontal section through a portion of an elevator car and adjacent front wall of the elevator shaft, including the sliding shaft door and panel or imitation door, and illustrates in top view the car control lever and the mechanism of my invention carried by the car for locking said lever in neutral position and also the actuating mechanism secured to the sill of the shaft door opening or other convenient portion of the wall of the shaft;

Fig. 10 is a vertical section through a portion of the same taken on the dotted line 1010 of Fig. 9. the car control lever being shown in its neutral position, with the locking mechanism therefor in normal position ready for operation;

Fig. 11 is a like section of the same taken on the dotted line 1111 of Fig. 9. and

Fig. 12 is a vertical section through a portion of the car taken on thedotted line 1212 of Fig. 11.

In the drawings, 20 designates the customary sliding door of an elevator shaft. 21 a stationary or panel door of usual char acter and 22 a sill or beam below the opening in the shaft for said doors, these enumerated parts being customary and provided at each floor of the building. 23 designates an elevator car having the power control handle or lever 24- for manual operation. said control lever being of well known purpose and character with the exception that in this instance 1 form the same with an arcuate concentric flange 25 having a central botton'i recess or pocket 26 to receive the upper end of a locking rod 27, hereinafter referred to. when it is desired to lock said leverin its neutral position and thereby prevent, while the shaft door is open, the setting of the car in motion.

I provide for the door 20 anysuitable mechanism to facilitate the opening and closing of the same, this mechanism preferably comprising two folding lever members 28, 29 pivoted together at their adjoining ends, at 30, while the outer end of the lever 28 is pivotally connected with an operating handle 31 pivoted. at 32, to the door 20, and the outer end of the lever 29 is pivoted at 33 to a bracket 34 secured to a stationary jamb Thelevers 28, 29 are equipped with a door-closing spring 36 and also with a checking or cushioning cylinder- 37 to prevent the closing of the door 20 with undue noise. The door opening and closingncohanism justbriefly referred to does-not cquire specific description since theil'samemis substantially the door opening and-closing mechanism made the subject of, Letters'Pat ent No. 1,203,413, granted to J.

Rosentreter, October 31, 1916. j

Upon the shaft wall afforded by the face of the sill or beam 22 I secure the actuat- 111 mechanism of my invention, thefsame being mounted in a box or casing 38 which has at one vertical end a guideway 39 for a bar 40 and in the lateralface of its other vertical end a slot 41 for the latch bolt 42. Within the casing 38 is pivotally mounted, on a stud or pin 43, a bell-crank lever 44, to the arm 45 of which is pivotally connected the inner end of the latch bolt 42, while the arm 46 of said lever is rounded at its outer end to form a head 47 adapted to enter, with reasonable snugness, a recess 48 formed in the inner vertical side edge of the bar 40. The limit of rocking movement of the bellcrank lever 44 is fixed by stop-pins 49, 50 located above and below the arm 46 thereof.

The bar 40 is adapted tohave a vertical sliding movement in the guideway 39 of the box or casing 38. and said bar is pivotally connected at its upper end with the lower end of a link51 whose upper end is pivot ed to the door lever 29 off from the pivot point thereof so that said lever may during the opening movement of the door 20 act as a crank to pull said link 51 and bar 40 upwardly and during the closing movement of the door force said link and bar downwardly.

The latch bolt 42 is of special formation at its upper-and lower edges to cooperate with the surfaces at the upper and lower edges of the slot 41. At the upper end of v the slot 41 the wall thereof is beveled downofthe slot 41, while the rear edges'- f recesses form stop shoulders 58', 59,'*res ec shown in Fig. 5 to its operating position"v opening of gthe door 20, and pushed thereby eled edges 52, 53 at the uppertively, to engage the inner walls atthe' up p and lower ends of the slot 41,. a's11showni Figs. '3 and 4 and for the purposes herein after explained,"

In the normal correct operation-K fthe mechanism the latch-bolt '42 will not. take either of the positions shown in Figs'3 and 4, but will move from its normal position shown in Fig. 6 b a direct thrust and -m aining horiz-onta The tilted positions of "F 7 o I I.

the latch-bolt 42 shown' in Figs.j3 and 4 will onlytake place when the shoe," which I will number .60, carried by the car, is not in correct position to receive thethrust of the latch-bolt 42 and coact therewith in keeping the latch-bolt horizontal or in the position shown in Fig; 6. i

: The mechanism hereinbefore described as provided on the'sliding door 20 and wall 7 shaft or beam 22 will be duplicated at each floor of the building, and this mechanism at 90.

1 each floor will cooperate with the mechanism carried by the car 23. v 1 The mechanism carried by the carl com-I V prises a bar 61which is secured at itsfrearj end by a pivot 62 to the bottom of the ear? -floor, as shown by dotted lines in and this bar 61 at its forward end is riveted to the shoe 60 which is verticallyelongated and preferably of angle'shapeiin cross-see tion, as shown in Fi' 7, and has a substan* tially fiat operative ace 63 which is prefer ably deflected outwardly at its upper and lower ends, as shown in Fig. .6. The shoe 60 is normally in a vertical plane adjacent to but spaced from the 'nonnal vertical plane of the "outer end of the latch-bolt 42 and stands near enough to said latch-bolt, when the car is positioned at "a floor of the building, to be engaged by said bolt, on the in a direction from said bolt, this movement of the shoe 60 being depended on, on the opening of the door 20, to cause the latchrod 27 to enter the pocket 26 of the control lever 24 and lock said lever in its neutral position. The bar 61 is a plain straight bar and extends through a retaining hanger loop 64 (Figs. 9 and 11) which serves to support the bar and also to limit the movement of its free end carrying the shoe 60 in a direc-' tion toward the latch-bolt 42. The loop 64 permits the free end of the bar 61 to be swung in a direction from the latch bolt 42, by the pressure of said bolt, on theopening of the door 20, against the shoe 60. The'bar 61 is yieldingly held in its normal positio shown in Fig. 9, by means of a weighted do 65 (Fig. 11') which has a claw engaging the bar 61 and yieldingly retaining said bar in normal position against one end of the loop ed dog 65 permits the bar 61 to be swung from its normal position by the pressure against the shoe 60 of the latch-bolt 42 onthe opening of the door 20, and when the door 20 is closing and the latch-bolt 42 is gradually receding into the casing 38, the weighted dog 65 acting against the bar 61 causes said bar to follow withlhe shoe 60 against the projectin end of the latch-bolt 42 until said her reac es its normal position against the end of the loop 64, when said bar will cease its movement and the latch-bolt 42 will continue in movement until it attains its normal position shown in Fig. 5. The weighted dog 65 is employed as a substitute for a spring for controlling the movement of the bar 61 and I make use of the dog 65 in preference to a spring, because of its more permanently reliable character. The dog 65 is pivotally hung between hangers 66 secured to the bottom of the car. The bar 61 has pivoted to it a link 67, and this link is pivotally connected with a cam-bar or rod 68 which is supported in hanger-yokes 69 secured to the bottom of the car, as shown in Figs. 10, 11 and 12, and at its outer end is formed with an inclined or cam-surface which normally lies outwardly beyond the lower end of the locking rod 27, as shown in Fig. 11, and at such time erforms no duty. The lower end of the 100 'ng rod 27 rests on the bar 68 and is guided in its vertical movements by passing freely through a hole in the car floor and by means of a bracket 71 secured on the standard 72 of the car control mechanism. The normal position of the mechanism carried by the car is that shown in Figs. 9 to 12 inclusive and this mechanism does not change its position, except when the car comes to rest at a floor of the building and the door 20 thereat is moved to open position.

It may be assumed that the car 23 has come to rest at a floor of the building and that the control handle 24 has been given its neutral position. On the opening movement of the door 20 at said floor the levers 28, 29 will be buckled upwardly '(Fig. 2) and the lever 29 will exert a pull on the rod 51 which in turn will draw upwardly on the bar 40, in whose recess 48 is then confined the bearing head 47 of the bell-crank lever 44, as shown in Fig. 5. The upward pull of the lever 29 on the rod 51 and therethrough on the bar 40, results in the said her sliding upwardly along the guide-way 39 and in said bar 40 carrying its recess 48 upwardly against and from the rounded bearing head 47 of the bell-crank lever 44, this movement of the.

bar 40 against said bell-crank lever acting to turn the arm 45 of said lever outwardly and in thereby thrusting the latch-bolt 42 against the shoe 60 carried by the bar 61,

t emes with the result otpushing said shoe and the free end of said bar 61 in a direction {from said bolt 42. The bolt 42 will commence to act against the shoe 60 almost immediately after the door 20 has started to open, there being suficient space between said shoe 66 and said bolt 42 when both are in normal position, shown in Fig. 5 to permit the door to fairly start on its opening movement before the bolt 42 reaches the shoe. After the bar 40 has moved upwardly far enough to carry its recess 48 from the bearing head 47 of the bell-crank lever 44, said bar will continue to ride upwardly along said hearing head 47 until the door 20 has been completely opened, as will be understood on reference to Fig. 2, the edge of the bar 40 then sliding against and acting as a bearing for the head 47 of the bell-crank lever and preventing any resistance ofi'ered by the shoe 60 from moving the latch-bolt 42 reversely or into the casing 38. The outward movement of the latch-bolt 42 due to the opening of the door 20 and the upward movement of the bar 40 is utilized to press the shoe 60 and the free end of the bar 61 toward the right, looking at Fig. 9, and this movement of the bar 61 acts through the link 67 to pull the cam-bar or rod 68 inwardly and this is for the purpose of drawing the inclined portion or cam 70 of said bar 68 against the lower end of the locking rod 27 so as to elevate said rod and thrust the upper end of the same into the pocket 26 on the control handle 24. While the door 20 remains open, the pressure of the latch-bolt 42 against the shoe 60 continues, and hence during this period the cam 70 and rod 27 will maintain the control handle 24 locked in its neutral position. When therefore the car is brought to rest at the floor of a building, with the shoe 60 on the car positioned opposite to the latch-bolt 42, as shown in Figs. 1 and 5, the door 20 may be opened either for the ingress or egress of passen rs, and so long as said door remains open t e control handle 24 will be locked in its neutral position by the action of the latch-bolt 42, shoe 60, bar 61, link 67, and cam-bar 68. Before the operator or attendant can again start his car in motion, he will be obliged to close the door 20 so as to retract the latch-bolt 42 and permit the weighted dog 65 to restore the bar 61, link 67 and cam-bar 68 to their normal position, said cam-bar then allowing the locking-rod 27 to descend and free the control handle 24 for operation.

If the attendant on the car should attempt to open the shaft door 20 before the car has properly reached the floor at which the door is located, the shoe 60 will then not be'in a position opposite to the latch-bolt 42, and under this condition the operator may be able to open the door 20 to the extent of an inch or more or until the lower recess 55 of the latch-bolt passes upon the lower edge of the opening 41 in the casing 38 or to the position shown in Fig. 3, at which time the stopshoulder 59 will engage the casing 38 and lock the bolt 42 against further outward movement, this occurring before'the bearing end' 47 of the bell-crank-lever 44 leaves the recess 48 of the bar 40. The locking of the latch-bolt 42 to the casing 38 prevents further upward movement of the bar 40, rod 51 and levers 28, 29, and thereby holds the door 20 against further opening movement, and therefore the door 20 can be opened, eX- cept to a slight extent, only when the elevator car is in proper relation to said door. \Vhen the latch-bolt 42 starts through the opening 41 on the openingof the door-20, the forward end of said bolt will, if the shoe 60 is in proper relation thereto, engage said shoe. and due to the resistance of the shoe will have a straight outward movement from the position shown in Fig. 5 to that illustrated in Fig. 6, the upper and lower recesses 54, 55 of the latch-bolt not then performing any duty. The recesses 54, 55 come into action when an attempt is made to open the door 20 and thrust the bolt 42 outwardly at a time when the car has not been properly positioned and the shoe 60 carried thereby is not in proper relation to the bolt 42. lVhen the car is either above or below the designated floor so that the shoe 60 has not been positioned, the attempt. to open the door 20 will result in the latch-bolt 42 sliding outwardly without the resistance which would otherwise be offered by the shoe 60, and at such time said bolt when moving from the position shown in Fig. 5 will tilt downwardly to the position shown in Fig. 3 and at its shoulder 59 interlock with the casing 38 at the lower end of the slot or opening 41, and thus the mechanism connected with the door will be locked against operation and the door cannot be opened. At this time, however, the door, having been slightly opened, may be returned to closed poistion, so that the operator on the car may bring the latter into proper alignment with the floor below the door 20, and this closing action of the door 20 at the time referred to will cause the rod "51 and bar 40 to descend and said bar acting against the arm 46 of the bell-crank lever 44 willl cause said lever to retract the latch bolt 42 into the casing 38 and to its normal position shown in Fig. 5. The beveled edge 57 at the forward end of the recess 55 of the latch-bolt 42 and the beveled edge 53 on the casing 38 at. the lower end of the opening or slot 41, are provided for the purpose of permitting the bellcrank lever 44 to readily retract the latchbolt 42 from its position shown in Fig. 3 to that shown in Fig. 5.the two beveled surfaces 57, 53 permitting the latch-bolt to slide inwardly into the casing 38.

insane? If the car should come to rest unduly below the floor at the door 20, the, shoe 60' might be too low, as I indicate in Fig. 4, to be operated by the latch-bolt 42, and under such condition the starting of the door 20 to open would result in the forward end of the latch-bolt 42 moving outwardly and being deflected upwardly by the upper end of the shoe 60, said latch-bolt then carrying its upper recess 54 against the upper edge of the casing 38 at the slot or opening 41, said latch-bolt under this condition becoming interlocked with the casing 38 by reason of the engagement of the stop-shoulder 58 on said bolt with the casing at the upper end of the slot or opening 41. A condition of this kindwould prevent the door 20 from being opened beyond a very slight extent or until the stop-shoulder 58 on the latch-bolt 42 entered into engagement with the casing 38 at the upper end of the slot or o ening 41, and the operator on the car woul know that he must close the door 20 and properly position his car and thereafter open the door; the closing of the door just referred to results in the bell-crank lever 44 retracting the latch-bolt 42 into the casing 38, the beveled surface 56 on the latch-bolt and the beveled edge 52 on the casing being adapted to permit the return of the latchbolt into the casing. The stop shoulders 58, 59 on the latch-bolt are therefore provided for interlocking the latch-bolt with the casing 38 so as to prevent the opening of the door 20, except under proper conditions, and the beveled edges 56, 57 on the latchbolt and the beveled edges 52, 53 on the casing 38 are to facilitate the retraction of the latch-bolt into the casing 38 on the closing of the door 20.

The shoe 60 is vertically elongated so as to avoid the necessity of a precise positioning of the car at the floors of the building or with relation to the latch-bolts 42, the elongated shoe passing into operative relation with the latch-bolt when the car is reasonably or safely positioned at a floor of the building. The shoe 60is also, by reason of its elongation adapted to continuein operative relation to the latch-bolt even though the car carrying the same should when arrested at a floor, sink to the slight extent that some cars at such time will due to the load carried by them.

During the usual travel of the car through .the shaft, the shoe 60 will move by the latchbolts 42 without touching the same, said bolts respectively only coming into action when the car is arrested and a shaft door is opened.

It is believedthat the operation of the features constituting my invention will be fully understood without further detailed explanation. My invention provides strictly mechanical means operable on the movement of a shaft door and without requiring other a personal ormanual attention, for preventing the unsafe opemn vwhen the car is proper y positioned thereat of the door except and for preventing. the movement of the car from the floor while the shaft door is en, thus compellin the operator to close t e door or permit t e same to close autochanical force as may be: present before the My invention is not limited to the special door opening and closin or door control .means shown, since whi e this door control mechanism is of a most satisfactory type and in extensive use, I am awarethat other toggle-lever and single lever and other kinds of door control mechanisms. are commonly known and with which my invention may,"

without difiicult be connected and used. One advanta e ue to the operation of my invention is t at the bolt 42 during the early portion of the opening, movement of the shaft door, moves against and moves the shoe to efiect the locking of the control mechanism on the car and that thereafter the shaft door. may continue its opening movement without-further action on the bolt 42 except that thebolt is held stationary against said shoe 60 thus assuring the continued locked condition of the control mechanism on the car while the door is continuing its opening movement and while the door remains open and until said door has almost reached the end of its closing movement. The particular means on the door for sliding the actuating and cam-bar 40 therefrom to actuate and control the bolt 42 is substantially unimportant so long as the results I attain are accomplished.

Neither do I limit my invention to the details of form and construction hereinbefore described as presenting the most satisfactory embodiment of the invention known to me, since I am aware that many of such details may be variously changed or modified within the spirit and scope of my invention as defined in the appended claims. I regard my invention as one of importance in the present condition of the art and desire to receive adequate protection for the same.

which said means are movable to operative nsane? position, actuating mechanism in the shaft at each floor comprising a bolt to be thrust against said shoe member on the opening of the shaft door for moving the same and j thereby the said locking means into operative position, said bolt being supported by the stationary sill below the shaft door-and normally being out of the path of said shoe, and means connected with the shaft door and disposed at the rear portion, of the face 1 thereof and extending below the door and operable on the opening of the same, associated with said actuating mechanism for moving said bolt against said shoe member to move the same and maintaining said bolt against said shoe member while the shaft door is open, for keeping the said power control mechanism on the car locked in neutral position while said door is open.

2. Safety mechanism for elevator shaft doors and elevator cars as in claim 1 having on the car and supported below the bottom thereof means associated with said shoe member holding the same in normal position and yieldingly resisting the movement of said member when pressed against by said bolt. Y

3. Safety mechanism for elevator shaft doors and elevator cars as in claim 1 having -means' for automatically locking said bolt and therefrom the shaft door when the shaft door is started to open position and said shoe member is not in position to be operated by said'bolt.

4. Safety mechanism for elevator shaft doors and elevator cars'as in claim 1, in whichthelocking means on the car comprises a pivoted bar supported horizontally below and from the bottom of the car and carrying on its free end said shoemember, means limiting the movement of said bar, means yieldingly retaining said bar in normal position and returning the same after operation to such position, a vertically movable locking rod to engage said car control mechanism when the same is in neutral position and means intermediate said bar and rod for operating the rod from said bar.

5. Safety mechanism for elevator shaft doors and elevator cars as in claim 1,- in which the locking means on the car comprises a pivoted bar supported horizontally below-and from the bottom of the car and V carrying on its free end said shoe member, means limiting the movement of said bar, a pivoted weighted dog supported from the bottom of the car and engaging said bar and yieldingly retaining said bar. in normal position and returning the same after operation to such position, a vertically movable looking rod to engage said car control mechanism when the same is in neutral position and means intermediate said bar and rod for operating the rod from said bar.

6. Safety mechanism for elevator shaft doors and elevator cars as in claim 1, in

which the locking means on the car comprises a pivoted bar carrying on its free end said shoe member, means limiting the movement of said bar, means yieldingly retaining said bar in normal position and returning the same after operation to such pos tion, a gravity locking rod to be moved vertically into locking enga ement with said car control mechanism when the same is in neutral position, a cam bar below said rod and a link connecting'said pivoted bar with said cam bar for operating the cam bar toposltion said locking rod when said pivoted bar is o erated by said bolt.

7. Salbty mechanism for elevator shaft doors and elevator cars as in claim 1 in which the actuating mechanism in the shaft, comprises a casing having an opening for said bolt, a bell-crank lever to one arm of which said bolt is pivoted, a slidable bar engaging the outer end of the other arm of said lever and means connected wi h th door and engaging said bar for moving the same on the opening of the door to turn said lever and thereby project said bolt against said shoe member.

8. Safety mechanism for elevator shaft doors and elevator cars as in claim 1 in which the actuating mechanism in the shaft comprises a casing having an opening for said olt, a bell-crank lever to one arm of which said bolt is pivoted, a slidable bar engaging the outer end of the other arm of said lever and means connected with the door and engaging said bar for moving the same on the o ening of the door to turn said lever and t ereby project said bolt against said shoe member, said bar havin an open recess normally receiving the on of its arm of said lever and a uniform surface following said recess to ride against said end of said arm after the recess leaves the same for holding said bolt in predetermined position during the further opening movement of the door.

9. Safety mechanism for elevator shaft doors and elevator cars as in claim 1 in which the actuating mechanism in the shaft comprises a casing having an opening for said bolt, a bell-crank lever to one arm of which said bolt is pivoted, a slidable bar engaging the outer end of the other arm of said lever and means connected with the door and engaging said bar for moving the same on the opening of the door to turn said lever and thereby project said bolt against said shoe member, said bolt having a recess in its edge and said casing having a wall at its said opening to receive said recess and lock said bolt and thereby the shaft door when the shaft door is started to open position and said shoe 7 member is not in position to be operated by said bolt, said bolt then tiltin downwardly to drop its said recess on sai wall, the inner end of said recess forming a stop shoulsaid bolt is pivoted, a slidable bar en aging the outer end of the other arm of sai lever and means connected with the door and engaging said bar for moving the same on the opening of the door to turn said lever and thereby project said bolt against said shoe member, said bolt having recesses in its upper and lower edges to interlock with said casing at the upper and lower edges respectively of said opening and thereby lock the shaft doorwhen the shaft door is started to open position and said shoe member is not prpperly positioned for operation by said 11. Safety mechanism for-elevator shaft doors and elevator cars as in claim 1 in which the actuating mechanism in the shaft comprises a casing having an opening for said bolt, a bell-crank lever to one arm of which said bolt is ivoted, a vertically slidable bar engaging t e outer end of the other arm of said lever and means connected with the door and engaging said bar for moving the same on the o ening of the door to turn said lever and t ereb project said bolt against said shoe mem er, said means connected with the door being toggle levers for use in opening said door and a link-bar connecting one of said levers off from its pivot point with said slidable bar so as to permit said lever while on its movements to act as a crank for operating said slidable bar.

12. Safety mechanism for elevator shaft doors and elevator cars as in claim 1 in which the actuating mechanism in the shaft comprises a support for said bolt, a control actuating member, means connected with the door and in operative engagement with said actuating member for operating the same on the opening of the door and means intermediate said actuating member and said bolt and operable by said member for projecting said bolt against and to move said shoe member, said actuating member being adapted to effect the full throw of said bolt during the early portion of the opening movement of the door and then to maintain said bolt in its operative position against said shoe member during the remaining portion of the opening movement of the door.

13. Safety mechanism for elevator shaft doors and elevator cars as in claim 1 in which the actuating mechanism in the shaft comprises a casing having a support for said bolt, a slidable bolt-control member, means connected with the door and in operative engagement with said control member for operating the same on the opening of the door and movement of the door and then to maintain said bolt in its operative position against said shoe member during the remaining portion of the opening movement of the door.-

14. Safet mechanism for elevator shaft doors and e evator cars as in claim 1 in which the actuating mechanism in the shaft comrises a caslng having a support for said bolt, a slidable bolt-control member, means connected with the door and in operative engagement with said control member for op erating the same on the opening of the door and means intermediate said control member 'iaeaoaa and said bolt and operable by said member for projecting said bolt against and to mdve said shoe member, said control-member be ing adapted to efl'ect the full throw of said bolt during the early portion of the opening.

movement of the door and then to maintain said bolt in its operative position against said shoe member during the remainin portion of the opening movement of the oor, said means connected with the door being door control lever means used in o ening the door and a link bar connected wit 1 the same and I ALBERT J. ROSENTRETER' 

